NDLI: Proton adsorption and acid-base properties of Tunisian illites in aqueous solution

Content Provider	Springer Nature Link
Author	Kriaa, A. Hamdi, N. Srasra, E.
Copyright Year	2009
Abstract	Suspensions of illite clay minerals samples of three different origins (American illite from Montana, It(Mo), Tunisian glauconite from Gafsa, It(Ga), and Tunisian illite — chlorite mixed layer from El Hamma, It(Ha)) were prepared. The Fourier Transform Infrared (FTIR) spectroscopy, X-ray Diffractometry (XRD), Electron Scanning Microscopy (SEM) and surface area measurements were used to characterize the three illite samples having different extent of isomorphic substitution. The layers have a permanent negative charge due to isomorphic substitutions and pH dependent charges on the surface hydroxyls on the edges. Surface speciation of these samples was investigated using continuous potentiometric titration and mass titration curves between pH 4 and 11 at 0.001 M, 0.01 M, and 0.1 M NaCl solutions at ambient temperature. The two methods revealed point of zero charge (PZC) of the amphoteric edges sites approximately similar to the purified samples, in the range ∼7.5–8.5, ∼8.2–8.7, and ∼ 9.0–9.3 for It(Mo), It(Ha) and It(Ga), respectively. The PZCs of freshly prepared dispersions are higher than those reported in the literature indicating basic character of these samples (pH of equilibrium suspensions in distilled water were ∼7.9–9). In the present study, the focus was on the surface charge characteristics. A simple SCM model approach is presented to explain the illite H$^{+}$ adsorption data. Surface weak acidic sites and surface ionization constants were calculated from titration data using regression methods. Sites with pKa 1 int values of 6–6.7; 5.4–5.8; 6.1–6.6 and sites at pKa 2 int values of 9.2–9.9; 10.2–10.4; 9.3–10 for It(Mo), It(Ga) and It(Ha), respectively, were assigned to amphoteric Al-OH and/or Fe-OH and Si-OH groups on the edges of illite samples.
Starting Page	273
Ending Page	287
Page Count	15
File Format	PDF
ISSN	00224766
Journal	Journal of Structural Chemistry
Volume Number	50
Issue Number	2
e-ISSN	15738779
Language	English
Publisher	Springer US
Publisher Date	2009-05-15
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	minerals clays illite point of zero charge potentiometric titration surface ionization constants Solid State Physics and Spectroscopy Atomic and Molecular Structure and Spectra Atoms, Molecules, Clusters and Plasmas Physical Chemistry Inorganic Chemistry
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Physical and Theoretical Chemistry Inorganic Chemistry

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Acid–base properties of pillared interlayered clays with single and mixed Zr–Al oxide pillars prepared from Tunisian-interstratified illite–smectite

Conformational Concept of Proton Ordering in Aqueous Systems

Emission Spectra of Cascade Decay Processes Initiated by K-Ionization of Argon

Determination of point of zero charge of PILCS with single and mixed oxide pillars prepared from Tunisian-smectite

Force constants of XH$_{n}$ groups and their dimensionality

CaBa2Cu2FeO6 Phase: Synthesis, Structure, and Mössbauer Spectra

Hexachlorocuprate(II) Anion: Vibration Spectra and Structure

CaBa2Cu2FeO7 Phase: Synthesis, Structure, and Mössbauer Spectra

Structure of adsorption complex: Modeling and experiment

Proton adsorption and acid-base properties of Tunisian illites in aqueous solution

Similar Documents

Acid–base properties of pillared interlayered clays with single and mixed Zr–Al oxide pillars prepared from Tunisian-interstratified illite–smectite

Conformational Concept of Proton Ordering in Aqueous Systems

Emission Spectra of Cascade Decay Processes Initiated by K-Ionization of Argon

Determination of point of zero charge of PILCS with single and mixed oxide pillars prepared from Tunisian-smectite

Force constants of XH$_{n}$ groups and their dimensionality

CaBa2Cu2FeO6 Phase: Synthesis, Structure, and Mössbauer Spectra

Hexachlorocuprate(II) Anion: Vibration Spectra and Structure

CaBa2Cu2FeO7 Phase: Synthesis, Structure, and Mössbauer Spectra

Structure of adsorption complex: Modeling and experiment

Proton adsorption and acid-base properties of Tunisian illites in aqueous solution